Shyness or fear of strangers; reluctance to approach or interact with unfamiliar people (often used for children).
彼の子どもは人見知りが激しく、よその親にはなかなか懐かない。
His child is very shy with strangers and doesn't warm up to other parents easily.
初対面の人と話すとき、少し人見知りしてしまう。
I get a bit shy when talking to someone for the first time.
人見知りを克服するために、少しずつ話しかける練習をしている。
To overcome shyness, I'm practicing approaching people little by little.